Premotor and prefrontal areaBasal nucleiCerebellar neurons

Lower mor=tor neurons

Cranial nerves

Innervate face and head

9

Spinal nerves

Innervate limbs & trunk

10

Somatic motor system effectors are...

Striated skeletal muscles

11

Motor unit

Just 1 motor neuron and all of the muscle fibers downstream of its axon that it contacts with presynaptic acetylcholine -producing terminals(can be many thousands as it is one terminal per muscle fiber)

12

Motor pools

Multiple motor units dedicated to one major muscle (ex. bicep) or group of synergistic muscles (ex: abdominals)